public override void Update(double dt)
{
base.Update(dt);
foreach (GridFin gridFin in _gridFins)
{
gridFin.Update(dt);
}
foreach (LandingLeg landingLeg in _landingLegs)
{
landingLeg.Update(dt);
}
DVector2 velocity = GetRelativeVelocity();
double altitude = GetRelativeAltitude();
DVector2 normalizedVelocity = velocity.Clone();
normalizedVelocity.Normalize();
DVector2 rotation = new DVector2(Math.Cos(Pitch), Math.Sin(Pitch));
// If we are going retro-grade and firing rockets adds soot
if (altitude < 70000 && normalizedVelocity.Dot(rotation) < 0 && velocity.Length() > 400)
{
foreach (IEngine engine in Engines)
{
if (engine.IsActive && engine.Throttle > 0)
{
_sootRatio = Math.Min(_sootRatio + 0.015 * dt, 1.0);
}
}
}
}
public void Update(TimeStep timeStep, DVector2 enginePosition, DVector2 shipVelocity,
double rotation, double throttle, double ispMultiplier, double angle = 0)
{
if (angle != 0)
{
_angle = angle;
}
double retrograde = rotation + Math.PI + _angle;
int particles = (int)((throttle * _particleRate) / timeStep.UpdateLoops);
// Interpolate between spreads based on ISP
double spreadMultiplier = (1.0 - ispMultiplier) * _minSpread + ispMultiplier * _maxSpread;
double throttleMultiplier = Math.Max(throttle, 0.3) * 0.01;
// Add new particles if nessecary
for (int i = 0; i < particles; i++)
{
if (_availableParticles.Count > 0)
{
double velocityFactor = _random.Next(200, 300) * throttleMultiplier;
double spread = _random.NextDouble() - 0.5;
DVector2 velocity = DVector2.FromAngle(retrograde + spread * spreadMultiplier);
int id = _availableParticles.Dequeue();
Particle particle = _particles[id];
particle.IsActive = true;
particle.Age = 0;
particle.MaxAge = _random.NextDouble() * 0.05 + _maxAge;
particle.Position = enginePosition.Clone();
particle.Velocity = shipVelocity.Clone() + velocity * velocityFactor;
}
}
// Update the particles
for (int i = 0; i < _particles.Length; i++)
{
Particle particle = _particles[i];
if (particle.IsActive)
{
particle.Position += particle.Velocity * timeStep.Dt;
particle.Age += timeStep.Dt;
if (particle.Age > particle.MaxAge)
{
particle.IsActive = false;
_availableParticles.Enqueue(i);
}
}
}
}
public void Update(TimeStep timeStep, DVector2 shipPosition, DVector2 shipVelocity, double pitch, double heatingRate)
{
double rotation = pitch - _offsetAngle;
DVector2 offset = new DVector2(Math.Cos(rotation), Math.Sin(rotation)) * _offsetLength;
DVector2 shockPosition = shipPosition - offset;
double normalizedHeating = Math.Max((heatingRate - 500000) * 0.0005, 0);
int particles = (int)(normalizedHeating * _particleRate) / timeStep.UpdateLoops;
// Add new particles if nessecary
for (int i = 0; i < particles; i++)
{
if (_availableParticles.Count > 0)
{
double velocityFactor = _random.Next(50, 200);
double spread = _random.NextDouble() * 2.5 - 1.25;
DVector2 velocity = DVector2.FromAngle(rotation + spread);
int id = _availableParticles.Dequeue();
Particle particle = _particles[id];
particle.IsActive = true;
particle.Age = 0;
particle.MaxAge = _random.NextDouble() * 0.01 + 0.02;
particle.Position = shockPosition.Clone();
particle.Velocity = shipVelocity.Clone() + velocity * velocityFactor;
}
}
// Update the particles
for (int i = 0; i < _particles.Length; i++)
{
Particle particle = _particles[i];
if (particle.IsActive)
{
particle.Position += particle.Velocity * timeStep.Dt;
particle.Age += timeStep.Dt;
if (particle.Age > particle.MaxAge)
{
particle.IsActive = false;
_availableParticles.Enqueue(i);
}
}
}
}
public void Update(TimeStep timeStep, DVector2 enginePosition, DVector2 shipVelocity,
double rotation, double throttle, double ispMultiplier, double angle = 0)
{
if (angle != 0)
{
_angle = angle;
}
_retrograde = rotation + Math.PI + _angle;
_throttle = throttle;
_position = enginePosition.Clone();
}
public void Update(TimeStep timeStep, DVector2 enginePosition, DVector2 shipVelocity, DVector2 retrogradeVelocity, double density, double sootRatio)
{
int particles = (int)((sootRatio * shipVelocity.Length() * 0.001) / timeStep.UpdateLoops);
if (density < 0.2 || density > 0.7)
{
particles = 0;
}
// Add new particles if nessecary
for (int i = 0; i < particles; i++)
{
if (_availableParticles.Count > 0)
{
var randomUnitVector = new DVector2(_random.NextDouble(), _random.NextDouble());
DVector2 velocity = shipVelocity.Clone();
int id = _availableParticles.Dequeue();
Particle particle = _particles[id];
particle.IsActive = true;
particle.Age = 0;
particle.MaxAge = _random.NextDouble() + 1;
particle.Position = enginePosition.Clone() + randomUnitVector * 2;
particle.Velocity = velocity + retrogradeVelocity * 0.5 + randomUnitVector * 2;
}
}
// Update the particles
for (int i = 0; i < _particles.Length; i++)
{
Particle particle = _particles[i];
if (particle.IsActive)
{
particle.Position += particle.Velocity * timeStep.Dt;
particle.Age += timeStep.Dt;
if (particle.Age > particle.MaxAge)
{
particle.IsActive = false;
_availableParticles.Enqueue(i);
}
}
}
}
public void Update(TimeStep timeStep, DVector2 enginePosition, DVector2 shipVelocity, double rotation, double throttle)
{
double retrograde = rotation + Math.PI;
int particles = (int)((throttle * _particleRate) / timeStep.UpdateLoops);
// Add new particles if nessecary
for (int i = 0; i < particles; i++)
{
if (_availableParticles.Count > 0)
{
double velocityFactor = _random.Next(150, 250);
double spread = _random.NextDouble() - 0.5;
DVector2 velocity = DVector2.FromAngle(retrograde + spread * _spreadFactor);
int id = _availableParticles.Dequeue();
Particle particle = _particles[id];
particle.IsActive = true;
particle.Age = 0;
particle.MaxAge = _random.NextDouble() * 0.1 + 0.05;
particle.Position = enginePosition.Clone();
particle.Velocity = shipVelocity.Clone() + velocity * velocityFactor;
}
}
// Update the particles
for (int i = 0; i < _particles.Length; i++)
{
Particle particle = _particles[i];
if (particle.IsActive)
{
particle.Position += particle.Velocity * timeStep.Dt;
particle.Age += timeStep.Dt;
if (particle.Age > particle.MaxAge)
{
particle.IsActive = false;
_availableParticles.Enqueue(i);
}
}
}
}
public override DVector2 GetInertialVelocity()
{
return(_cachedInertialVelocity.Clone());
}
/// <summary>
/// Gets the relative velocity of the spacecraft. If the space craft is within the parent's
/// atmosphere than the rotation of the planet is taken in account. Otherwise its a simple difference of velocities.
/// </summary>
public override DVector2 GetRelativeVelocity()
{
return(_cachedRelativeVelocity.Clone());
}
